Condenser



Aug' 19, l930 H. M. YEAGER 1,773,249

CONDENSER Filed Aug. 21. 1928 4 Sheets-Sheet l HIMMMMMHF 'l' Si? I l l ll l l l l l'l'! rl Aug' 19, 1930- H. M. YEAGER 1,773,249

CONDENSER Filed Aug. 21, 1928 4 Sheets-Sheet 2 Aug. 19, 1930. H. M.YEAGER CONDENSEF Filed Aug. 2] 1928 4 Sheets-Sheet MllEiv il: 5Mil= Aug.19, 1930. H. M. YEAGER CONDENSER Filed Aug.'21, 192e 4 sheets-sheetPatented Aug. 19, 1930 UNITED STATES PATENT OFFICE HENRY M. YEAGER, FBUFFALO, NEW YORK, ASSIGNOR TO FEDDEBB MANUFACTUR- IG COMPANY, INC., OFBUFFALO, NEW YORK, A CORPORATION OF NEW YORK CONDENSER Application medAugust 21, 192B. Serial No. 301,070.

This invention relates to a condenser which is more particularlydesigned for use in dof mestic refrigerating apparatus for condensingthe vaporized refrigerant after the same has been expanded by the heatin the spaces to be cooled so that this refrigerant can be again used inliquid form for continuing the refrigerating operation.

Condensers for this purpose usually 1nclude a coil of serpentine formupon which a plurality of radiating fins are mounted so as to increasethe radiation of heat in the vapors or gases to the atmosphere andhasten the operation of liquefying the gas. In order to reduce thejoints in the coil as much as possible and thereby minimize theliability of leakage o'f the refrigerant therefrom 1t has been proposedto make the coil of one continuous piece of tubing which is bent anddoesnot employ any couplings at the turns. Such construction of the coil hasheretofore not permitted of economically mounting radiating fins orstrips thereon by slipping the fins lengthwise on the severalconvolutions of the coil because these fins can not readily pass aroundthe turns or bends of 'the same, thereby not only increasing the cost ofmanufacture but also reducing the eiiiciency of the condenser.

It is the object of this invention to provide a condenser in which thecoil is continuous and the bends or turns connecting the severalconvolutions are of the same diameter or cross section as the mainsections or stretches of the coil and which is provided with radiatingfins or strips so constructed that the same can be slipped over thebends and onto the main sections or stretches of the coil easily,quickly and economically and provide a condenser which is strong anddurable and furnishes the maximum condensing etliciency.

In the accompanying drawings:

Fig. 1 is a side elevation of a condenser embodying my invention andshowing the same organized `for producing a single pass of therefrigerant.

Fig. 2 is a vertical cross section of the same taken on line 2 2, Fig.1.

Fig. 3 is a fragmentary side elevation 011l an enlarged scale, of thecondenser correspendingy to Fig. 1 but showin the last radiating n inthe form in whic it is slipped simultaneously over a plurality of bendsand upon a plurality of main stretches of the coil.

Fig. 4 is a vertical cross section taken on line 4 4, Fig. 3.

Fig. 5 is a horizontal section taken on line 5 5, Fig. 3.

Fig. 6 is ar fragmentary perspective view of the condenser shown inFlgs. 1-5.

Fig. 7 .is an elevation of a modified form of radiating fin or stripembodying my mprovement.

Fig. 8 is a side elevation showing a con-- denser made in accordancewith my invention, but having two passes of the coils.

Fig. 9 is a vertical cross section taken on line 9 9, Fig. 8. y

Fig. 10 is a condenser organized according to my improvement andcontaining three passes.

l Fig. 11 is a vertical cross section, taken on line 11 11, Fig. 10.

In the following description similar characters of reference indicatelike parts in the several figures of the drawin s.

Referring to Figures 1-6, t e numeral 20 represents the parallel mainstretches or sections and 2l the turns or bends which alternatelyconnect the corresponding ends of the stretches thereby forming a coil.This coil is made continuousl from a single piece of metal tubing orplping of uniform diameter or cross section to produce a coil having aplurality of convolutions which are folded relatively to one another.

The material to be condensed may be conducted into one end of this coilin any suitable manner and the condensate discharged from the oppositeend thereof is delivered to any desired place.

Upon the stretches of this coil are mounted radiating means consistingpreferabl of a plurality of sheet metal iins 22, each aving i the formof a. strip and provided with a plurality of transverse corrugationsA23, 24 arranged alternately on opposite sides of the for the receptionof a pair of adjacent coil stretches and for permitting this lin to bepassed over the turn connecting the corres nding ends of said stretches.Each of tllgse slots, as shown in Figs. 1-6 may be formed by punchingtwo spaced holes 26 in adjacent parts of the fin and slitting the metalfrom one of these holes to the other, as shown at 27 in Figs. 2 and 6,thereby forming two wings 28 on the fin between the opposing 1nner sidesof the companion holes 26 which normally are arranged in line or in thesame plane and face each other. The wings of each of these pair of holesare now turned to one side, as shown in Figs. 3, 4, and 5 so that thetwo holes communicate with each other and in effect form a slot, asshown in the upper art of Fi 4,

e coil am? the fins can now be assembled by slipping each fin or stripwith its several slots over the turns or bends of the coll at one endthereof and then slipping this fin over the corresponding air of coilstretches. yThe distance between t e centers of each pair of holes isthe same as the distance between the centers of the respective pair ofcoil stretches whereby the opposite end portions of each of these slotsiit snugly around the outer halves of the respective pair of coilstretches. After each iin or strip has been thus simultaneously slippedupon a plurality of pairs of coll stretches in this manner the wings 28on the central parts of the longitudinal edges of each slot are againbent back into allnement so that they face each other and engage wlththe inner halves of the opposing inner sldes of the companion coilstretches. v

By this means each coil stretch 1s engaged by each fin around its entireperlphery whereby a maximum contact is formed between the coil and thefins and a highest efliciency is obtained in transferring heat from therefrigerant to the atmosphere.

The metallic contact between the coil and the fins is further increasedto hold these members in place relatively to each other and also toimprove the heat transference by soldering or welding the fins on thecoil stretches.

When placing the fins on the coil the corrugations of the several finsor strips engage each other and these operate as spaces which formpassages for the air between the ins and coil.

' each slot left open,

These corrugations which are arranged beytween adjacent slots extendentirely across the respective strip, as shown 'at 23, but thosecorrugations in line with the slots are yformed in sections arranged onopposite sides of each of these slots, as shown at 24, in Figs. 2, 4),and 6.

If it is desired to reduce the cost of manufacture the wings 28 may beomitted and as shown at 29 in Fig. 7 but this construction sacrificessome of the in the formation of contact between the fins and the coilstretches.

In the construction shown in Figs. 1-6 the several convolutions of a glepipe or tube arranged in the same lane so that a condenser is producedhavlng but a single pass or condensing region.

If a condenser isrequired having two passes or condensing regions asingle continuous pi e or tube is bent, as shown in Fi s. 8 an 9, toform two vertical tiers of coi stretches 30, 31, and each stretch of onetier is connected with the corresponding enc'. of a stretch in the othertier by a turn or bend 32 which inclines, so that the iiuid will readilyflow from one convolution of the coil to another. In this constructionthe\ radiating fins or strips are made similar to those in Figs. 1-6,exce ting that the coil receivin slots are incline instead of beingvertical, and all of the corrugations 33 are of sectional form insteadof some being sectional and others complete.

When a condenser of larger capacity is required the number of asses maybe further increased. For examp e, in Figs. 10 and 11 is showna-construction in which three coils are arran d to form three verticaltiers of coil stretc es 34, 35, 36, which are s aced laterally from eachother and the stretc es or convolutions of the several coilsbeing alsostaggered relatively to each other.

Each coil in thls particularl constructionv is assembled with theradiating fins or strips 37 in the manner described with reference tothe single pass condenser shown in Figs. 1-6 and the same referencecharacters are therefore a plied to corresponding parts.

In t s triple ass condenser it is preferable to connect t ecorresponding inlet ends of the several coils by a single 1nlet headeror manifold 38 and the corresponding outlet ends of these coils by asingle outlet header or manifold 39.

, Each of the forms of my invention pos-l sesses the advantage ofsimplicity of construction and manufacture, maximum condensing eilciencand absence of leakage inasmuch as the fins are fitted tightly, exditiously and economically to continuous tubing or piping.

I claim as my invention: 1. A condenser comprising a coil having aplurality of convolutions forming main stretches and turns connectingcorresponding ends of said stretches, and fins mounted on said stretchesand each provided with a plurality of slots, each turn of the coil p :sthrough one of said slots and opposite enz of each slot engaging withthe outer side of adjacent stretc es o the coil each of said beingprovided between the ends of each of its slots with wings which aredisplaced the respective slot and which are bent into line with eachother and coils` ma e of.

into engagement with the opposing inner sides of the respective mainstretches after the fin has been passed over the same.

2. A condenser comprising a coil having a plurality of convolutionsforming main stretches and turns connecting corresponding ends of saidstretches, and iins mounted on said stretches and each provided with aplurality of slots, each turn'of the coil passsignature.

HENRY M. YEAGER.

